nav {
    position: fixed;
    bottom: 0;
    left: 0;
    background: #1F1F1F;
    width: 100%;
    z-index: 500;
}

nav ul {
    width: 100%;
    overflow: hidden
}

nav ul li {
    width: 25%;
    float: left;
    text-align: center;
    overflow: hidden
}

.nav_icon1 {
    background: url(../../images/nav/nav_icon1.png) no-repeat center .6rem
}

.nav_icon2 {
    background: url(../../images/nav/nav_icon2.png) no-repeat center .6rem
}

.nav_icon3 {
    background: url(../../images/nav/nav_icon3.png) no-repeat center .6rem
}

.nav_icon4 {
    background: url(../../images/nav/nav_icon4.png) no-repeat center .6rem
}

nav .current a {
    color: #fee28e
}

nav .current1 {
    background: url(../../images/nav/nav_icon1_in.png) no-repeat center .6rem
}

nav .current2 {
    background: url(../../images/nav/nav_icon2_in.png) no-repeat center .6rem
}

nav .current3 {
    background: url(../../images/nav/nav_icon3_in.png) no-repeat center .6rem
}

nav .current4 {
    background: url(../../images/nav/nav_icon4_in.png) no-repeat center .6rem
}

nav ul li a {
    font-size: .75rem;
    display: block;
    padding: 1.875rem 0 .5rem 0;
    color: #aaa;
}